Person: ÖZYILMAZ, ÖZGÜN YUSUF
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Publication Temperature rises during tooth bleaching with different light-curing units(2015-08-03T00:00:00Z) Ozyilmaz, Ozgun Yusuf; Yavuz, Tevfik; SARI, Tugrul; Aykent, Filiz; Ozturk, Atiye Nilgun; ÖZYILMAZ, ÖZGÜN YUSUFThe aim of this study was to evaluate the influence of three different light-curing units on the temperature rise induced in the pulpal cavity, when bleached with 35% hydrogen peroxide (HP). Forty extracted maxillary central incisors were randomly divided into four groups according to photoactivation procedure (n=10). Whiteness HP (WHP) bleaching agent which contains 35% HP bleach was placed on the facial tooth surface and no photoactivation device was used (control); an blue light-emitting diode (LED, 40s), a diode laser (4W, Continous mode, 20s), and Nd:YAG laser (4W, 60Hz frequency, 20s). Temperature rise in the pulpal chamber was measured with a J-type thermocouple wire that was connected to a data logger before and immediately after each 20-40s application. One tooth of each group was selected for scanning electron microscope analysis. Data were analyzed using one-way ANOVA followed by the Games Howell post hoc test at a preset alpha of 0.05. One-way ANOVA revealed that there was a significant difference among the light-curing units (p<0.05) and between control group and light-curing units (p<0.05). The Nd:YAG induced significantly, which resulted in higher temperature increase than other light-curing units (10.7 degrees C). The LED unit produced the lowest temperature changes (3.2 degrees C) among the light-curing units. The presence of the bleaching gel did not cause a temperature increase in control group (0 degrees C). The results suggested that using light-curing units caused temperature changes in the intrapulpal cavity during tooth bleaching. The use of LED will be more safer for pulpal health when assisted with WHP bleaching gel.Publication Effects of Various Denture Cleansers on Color Stability of Polyamide Polymer and Polymethyl Methacrylate.(2018-11-25) ÖZYILMAZ, ÖZGÜN YUSUF; ÖZYILMAZ, ÖZGÜN YUSUFPublication Effect of two activated bleaching techniques on surface roughness of different esthetic restorative materials(2017-01-01T00:00:00Z) ALPTEKİN, Tuncay; Özyilmaz, ÖZGÜN YUSUF; Aykent, Filiz; Kara, Haluk Bariş; ÖZYILMAZ, ÖZGÜN YUSUFPublication Temperature Rises During Tooth Bleaching with Different Light Curing Units(2012-05-03T00:00:00Z) Özyılmaz, Özgün Yusuf; Yavuz, Tevfik; Sarı, Tuğrul; Aykent, Filiz; Öztürk, Atiye Nilgün; ÖZYILMAZ, ÖZGÜN YUSUFPublication Influence of the Surface Roughness of Different Treatments to Monolithic Zirconia.(2018-09-30) AKIN, CEYDA; ÖZYILMAZ, ÖZGÜN YUSUF; ÖZYILMAZ, ÖZGÜN YUSUFPublication The Effect of Glazing Procedures on Color Stability of Seven Different Ceramics.(2018-07-28T00:00:00Z) ÖZYILMAZ, ÖZGÜN YUSUF; SAYIN ÖZEL, GÜLSÜM; OĞUZ AHMET, BEBEK SERRA; ÖZYILMAZ, ÖZGÜN YUSUFPublication Evaluation the Effect of Various Surface Pretreatment on Shear Bond Strength Between Polyetherketonekethone (PEKK) and Resin Cement.(2018-12-02) SAYIN ÖZEL, GÜLSÜM; ÖZYILMAZ, ÖZGÜN YUSUF; ÜNLÜ, NİMET; VELİOĞLU, MEHMET SEMİH; AKIN, CEYDA; ÇELEBİ, HAKKI; ÖZYILMAZ, ÖZGÜN YUSUFPublication Evaluation of the shear bond strength of resin cement to enamel after bleaching with Er: YAG and diode laser(2020-05-05T00:00:00Z) Ceyda, Akin; Mujde, Sevimay; Neslihan, Cokuk; ÖZYILMAZ, ÖZGÜN YUSUFObjective:Publication Effects of repeating bleaching procedure on color stability various porcelains(2019-09-08T00:00:00Z) SAYIN ÖZEL, GÜLSÜM; TAHA, MUHAMMED ESAD; ÖZYILMAZ, ÖZGÜN YUSUF; ERDEM, KÜBRA; ERDEM, KÜBRA; ÖZYILMAZ, ÖZGÜN YUSUFPublication Evaluation of various denture cleansers on color stability and surface topography of polyetherketoneketone, polyamide, and polymethylmethacrylate(2020-08-01T00:00:00Z) ÖZYILMAZ, ÖZGÜN YUSUF; AKIN, CEYDA; KARA, ÖZLEM; ÖZYILMAZ, ÖZGÜN YUSUF; KARA, ÖZLEMThe aim of this study was to evaluate the effect of sodium perborate effervescent tablets and citric acid solution on the color stability and surface topography of a new generation of high-performance polymer polyetherketoneketone (PEKK), thermoinjection-molded polyamide, and polymethylmethacrylate (PMMA). Fifty disc-shaped specimens were fabricated (10 mm x 2 mm) from PEKK (P group), polyamide (D group), and PMMA (M group). These groups were divided into five subgroups (n= 10) according to the storage media. The test groups were immersed in the following solutions: distilled water (Control), Corega, Protefix, Perlodent, and Curaprox. The color stability values (Delta E) were measured using a spectrophotometer before and after immersion in distilled water and four different denture cleansers for 8 hr/day for 140 days. Topography alterations after treatments were assessed with scanning electron microscopy (SEM). Data were analyzed by one-way analysis of variance (ANOVA) followed by Tukey-s Honest Significant Difference test. Thep < .05 was considered significant. All denture cleansers increased the Delta Evalues relative to the baseline values in the M, D, and P groups (p < .05). The Perlodent denture cleanser demonstrated the highest Delta Evalue in all groups, which was unacceptable. Curaprox denture cleanser showed the lowest Delta Evalue in the M and D groups (p < .05). Curaprox in all groups showed a increment Evalue less than 3.7. For patients who have PEKK- and polyamide-based prosthesis, the use of citric acid-based cleansers may be more recommended than sodium perborate-containing cleansers because of its clinically acceptable color changes on polymers in terms of color stability.